<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<script src="../js/jquery-1.12.4.js"></script>
<script>
  $.ajax({
     url: '../data/user.json',
     dataType: 'json',
     success:function (data) {
       console.log("xx1 ok！",data)

        $.ajax({
          url: '../data/user2.json',
          dataType: 'json',
          success:function (data2) {
            console.log("xx2 ok",data2)

             $.ajax({
               url: '../data/user3.json',
               dataType: 'json',
               success:function (data3) {

                 console.log("xx3 ok",data3)
               }
             })
          }
        });
    }
  });

</script>

</body>
</html>
